APA (7th ed.) Citation

United States. Postmaster General. (1928). Treatment of domestic registered, insured and C.O.D. articles found to be undeliverable as addressed. U.S. GPO.

Chicago Style (17th ed.) Citation

United States. Postmaster General. Treatment of Domestic Registered, Insured and C.O.D. Articles Found to Be Undeliverable as Addressed. Washington: U.S. GPO, 1928.

MLA (9th ed.) Citation

United States. Postmaster General. Treatment of Domestic Registered, Insured and C.O.D. Articles Found to Be Undeliverable as Addressed. U.S. GPO, 1928.